Nartsuk, silap inua, (see Sila) was the son of a giant who after being muedered flew into the air becoming a spirit. His role appears extremely limited, and his human outline very vague. The character itself seems less important than the concept it contains or represents.
He is the air, not the sky; movement, not the wind; the very breath of life, but not merely physical life; he is clear-sighted energy, activating intelligence, the powerful fluid circulating “all around” and also within each individual; to be deprived of sila is in the same sense, and simultaneously, it is the equivalent of acting contrary to morals, since sense or reason are no longer there to govern behavior.
When personified Nartsuk is frequently seen as very terrifying, at other time benevolent, and when being the latter he gives his own sila-substance to an ill man to revive him or to an angekkok postulate to help his realize his full potential; and thus the candidate will try to attract Nartsuk’s attention and compassion. A.G.H.
Grimal, Pierre, Larousse World Mythology, Secaucus, New Jersey, Chartwell Books, 1965, p. 446